// url()函数 url 地址 - 简写
$roboto-font-path: "../fonts/roboto";

@font-face {
    src: url("#{$roboto-font-path}/Roboto-Thin.woff2") format("woff2");
    font-family: "Roboto";
    font-weight: 100;
}

// calc() 函数
.logo {
    $width: 800px;
    width: $width;
    position: absolute;
    left: calc(50% - #{$width / 2});
    top: 0;
}
